Rare, scarce, unique, interesting, and unusual books for sale, mostly in the history of physics, mathematics, and technology. The bookstore site is part of a larger daily blog for the History of Holes, Dots, Lines, Science, History, Math, the Unintentional Absurd & Nothing |1.6 million words, 7000 images, 4 million hits and 4200+ posts over 10 years| Press & appearances in The Times, The Paris Review, Le Figaro, The Economist, The Guardian, Discovery News, Slate, Le Monde, Sci American Blogs, Le Point, and many other places...